TPS40053

www.ti.com TPS40050 TPS40051 8 TPS40053 SLUS540F − DECEMBER 2002 − REVISED JUNE 2004 WIDEĆINPUT SYNCHRONOUS BUCK CONTROLLER FEATURES D Operating Input Voltage 8 V to 40 V D Input Voltage Feed-Forward Compensation D < 1 % Internal 0.7-V Reference D Programmable Fixed-Frequency Up to 1 MHz Voltage Mode Controller D Internal Gate Drive Outputs for High-Side and Synchronous N-Channel MOSFETs D 16-Pin PowerPADt Package (θJC = 2°C/W) D Thermal Shutdown D Externally Synchronizable D Programmable High-Side Current Limit D Programmable Closed-Loop Soft-Start D TPS40050 Source Only D TPS40051 Source/Sink D TPS40053 Source/Sink With VOUT Prebias APPLICATIONS D Power Modules D Networking/Telecom D Industrial D Servers SIMPLIFIED APPLICATION DESCRIPTION The TPS4005x is a family of high-voltage, wide input (8 V to 40 V), synchronous, step-down converters. The TPS4005x family offers design flexibility with a variety of user programmable functions, including soft-start, UVLO, operating frequency, voltage feedforward, high-side current limit, and loop compensation. The TPS4005x are also synchronizable to an external supply. They incorporate MOSFET gate drivers for external N-channel high-side and synchronous rectifier (SR) MOSFETs. Gate drive logic incorporates anti-cross conduction circuitry to prevent simultaneous high-side and synchronous rectifier conduction. The TPS4005x uses voltage feed-forward control techniques to provide good line regulation over the wide (4:1) input voltage rang...